Research On The Key Technologies Of High-speed Optical Data Cable

With the development of communication technology, the requirement of data transmission is higher and higher. Improving network bandwidth and speed, is mainly in two aspects, one is transmission medium can achieve high bandwidth and high rate; the other is interconnect technology should minimize the negative effect on data transmission. Compared with the copper cable, fiber has the advantages of high bandwidth, large capacity, low loss, long-distance connection, low weight, small volume, good antiinterference and high security, is gradually replace copper wire, and widely used in all the industries. Therefore it is important to carry out the research on high-speed optical data cable. In this paper, the key technologies of high-speed optical fiber data cable are studied. Basing on these key technologies, we have completed the fabrication and test of 10.32 Gbps SFP+ high speed optical transceiver component. This thesis mainly includes the following four areas.(1) In this paragraph, we focus on the development situation of high-speed optical data cable and research the development of their key technologies, emphasizing on data rate and bandwidth, receiver sensitivity, bit error rate(BER), footprint and so on.(2) We elaborate the high speed digital signal transmission theory and focus on the key technologies of high-speed optical data cable, analyzing the principle of data rate, receiver sensitivity, BER. At the same time, we calculate the theoretical value of receiver sensitivity at the rate of 2.5 Gbps and 10.32 Gbps, while BER = 1.0×10-9. These analyses are the theoretical basis for design.(3) We determine the specific plan. First we investigate the device such as laser, receiver, laser driver, limiting amplifier and controller and monitor on sale, and choose the devices which have high-reliability and meet the performace requirements. Second, implemente the SFP+ optical transceiver module package, and design the fuction of digital diagnostic monitoring(DDM). Finally, combing result of high-speed digital signal intergrity analysis, design the PCB board.(4) At last, we test the completed transceiver component. There are six test content: data rate, optical wavelength, supply voltage and current, average output power, spectral width and receiver sensitivity at 2.5 Gbps and 10.32 Gbps. Through test, transceiver component’s data rate can be up to 10.32 Gbps, transmitter optical output power is-2.03 dBm, receiver sensitivity can reach-16.21 d Bm at the rate of 10.32 Gbps and-18.81 dBm at the rate of 2.5 Gbps. At the same time, transceiver component also meet the SFP+ specifications SFF-8431.